CVE-2026-3502

TrueConf Client Update Integrity Verification Bypass

HIGH

7.8

CVSS Score

Published: March 30, 2026 at 06:05 PM UTC

Updated: June 17, 2026 at 10:43 AM UTC

2 products affected across 1 vendorTrueconfTrueConf Client

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Severity

HIGH7.8

Exploitation

CISA KEV

Exploit prediction

EPSS 6%

SSVC

Active

Actively Exploited

CISA Known Exploited Vulnerabilities (KEV) Catalog

EPSS Score5.8%

EPSS (Exploit Prediction Scoring System) estimates a 5.8% chance this CVE is exploited in the wild within the next 30 days — higher than 93% of all CVEs. It complements CVSS: a high EPSS on a mid-severity CVE can still be urgent.

TrueConf Client contains a download of code without integrity check vulnerability. An attacker who is able to influence the update delivery path can substitute a tampered update payload. If the payload is executed or installed by the updater, this may result in arbitrary code execution in the context of the updating process or user.

Required Action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Ransomware Use

Unknown

Added to KEV

Apr 2, 2026

Remediation Due

Apr 16, 2026

196 days overdue

Notes

https://trueconf.com/blog/update/trueconf-8-5

https://trueconf.com/downloads/windows.html

https://nvd.nist.gov/vuln/detail/CVE-2026-3502

Description

TrueConf Client downloads application update code and applies it without performing verification. An attacker who is able to influence the update delivery path can substitute a tampered update payload. If the payload is executed or installed by the updater, this may result in arbitrary code execution in the context of the updating process or user.